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Table 1 List of abbreviations and corresponding parameters that were taken into account in the statistical analysis

From: Occurrence of the invasive Spanish slug in gardens: can a citizen science approach help deciphering underlying factors?

Parameter abbreviation

Description

Abiotic parameters

 alt

Meters above sea level

 cfc

Applied slug control methods in the year previous to data collection

 cc

Applied slug control methods in the year of data collection

 comc

Applied slug control methods in the previous year and the year of data collection

Biotic parameters

 slugs

Number of slugs under the cardboard

 worms

Number of earthworm casts under the cardboard

 plants

Number of plants in a radius of 2 m around the data collection point

Meteorological parameters from the data collection year

 mvp

Mean vapour pressure

 matemp

Mean air temperature

 maxatemp

Maximum air temperature

 minatemp

Minimum air temperature

 mrhumid

Mean relative humidity

 prec

Precipitation

 rad

Global radiation on the day of data collection

 smetcy

Sum of the mean daily temperature from the beginning of the year until the day of data collection

 smaxtcy

Sum of the maximum daily temperature from the beginning of the year until the day of data collection

 smintcy

Sum of the minimum daily temperature from the beginning of the year until the day of data collection

 spreccy

Sum of the precipitation from the beginning of the year until the day of data collection

 frostcy

Number of days below 0 °C from January to April

 spscy

Sum of the precipitation in March (the month directly before sampling) of the year of data collection

 mpscy

Mean precipitation in March (ditto)

Meteorological data from the year previous to data collection

 smetpy

Sum of the mean temperature

 smaxtpy

Sum of the maximum temperature

 smintpy

Sum of the minimum temperature

 sprecpy

Sum of the precipitation

 frostpy

Number of days below 0 °C from September to December

 drypy

Number of days without precipitation from March to September

 spspy

Sum of precipitation from March to September

 frostwint

Number of days below 0 °C from the winter before data collection (September to April)